#14 when no where filter is used, don't apply

- corrected check for empty or

src/Filter/FilterLogic.php

@@ -137,7 +137,7 @@ public function generateExpressions(QueryBuilder $queryBuilder, QueryNameGenerat
     protected function doGenerate($queryBuilder, $queryNameGenerator, $resourceClass, $operationName, $context)
     {
         if (empty($context['filters'])) {
-            return;
+            return [];
         }
         $oldWhere = $queryBuilder->getDQLPart('where');